JP2002035466A - Drum type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum type washing machine capable of detecting the volume of washings for a short time. SOLUTION: The drum type washing machine 1 comprises providing a rotating tub 12 consisting of a horizontal drum rotated and controlled by a driving mechanism 14 inside a water tank 7 elastically supported by a damper 9 inside an outer box 2. A coil 38 is provided on a cylinder 32 of the damper 9 and a magnetic material 40 is provided on a supporting plate 8 shifting together with the water tank via a wire 39. Thereby displacement of the water tank to the outer box according to the volume of the objects to be washed is transformed to a change of an inductance component of the coil. An oscillation signal of an oscillation frequency according to the change of the inductance component is output in a displacement value detecting circuit. The volume of the objects to be washed inside the rotating tub is detected by a detection of the oscillation frequency of the oscillation signal in means for detecting the volume of the objects to be washed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum type washing machine capable of detecting laundry capacity in a short time with high accuracy.

[0002]

2. Description of the Related Art In recent years, a drum constructed by arranging a horizontal shaft-type drum which is installed in the water tank and rotationally controlled by a drive motor is disposed in a water tank elastically supported by a spring element or the like inside an outer box. In a type washing machine, there is provided a type of washing machine which automatically detects the volume of laundry put into a drum, determines and displays the amount of detergent used according to the detected laundry volume. I have.

[0003] Conventionally, the automatic detection of the laundry volume in the drum has been performed by utilizing the fact that the change in the number of revolutions at the start of rotation of the drum changes in accordance with the laundry volume in the drum. Specifically, when the user puts laundry into the drum and presses the washing start button, the drive motor is energized to rotate the drum to a predetermined number of revolutions and then naturally stops. Measure the time required to rise from the start of rotation to a predetermined number of rotations, or the time required to fall from a predetermined number of rotations of the drum to a certain number of rotations,
The laundry capacity is detected according to the measured time.

[0004]

However, in such a conventional structure for detecting the laundry capacity in the drum,
Since it is necessary to perform control to stop the drum after rotating the drum to a predetermined number of revolutions, it takes a long time to detect the laundry capacity. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a drum-type washing machine capable of detecting a laundry capacity in a short time.

[0005]

According to a first aspect of the present invention, there is provided a drum type washing machine comprising: a water tank elastically supported in an outer box; a drum installed in the water tank and controlled in rotation by a drive motor; In a drum type washing machine having control means for controlling rotation of a motor, a displacement amount detecting means for detecting a displacement amount of the water tub with respect to the outer box in response to a load of laundry into the drum; And a laundry capacity detecting means for detecting a laundry capacity in the drum based on the displacement detected by the quantity detecting means. According to such a configuration, the displacement amount of the water tub with respect to the outer box according to the loading of the laundry into the drum can be instantaneously detected by the displacement amount detecting means, so that the detection time of the laundry capacity can be shortened. can do.

According to a second aspect of the present invention, in the drum type washing machine, the displacement amount detecting means includes a coil mounted on an outer box or another stationary portion, a magnetic body mounted on a water tank or a portion displaced together therewith, An oscillator having an oscillating frequency that varies according to an inductance component of the coil, wherein the laundry capacity detecting means is configured to detect the laundry capacity in the drum based on the oscillating frequency of the oscillator; Is set in the detection range.

[0007] According to such a configuration, the displacement of the water tank with respect to the outer box according to the loading of the laundry into the drum can be detected as a change in the oscillation frequency of the oscillator. In addition, by setting the region where the rate of change of the oscillation frequency is large as the detection range, the accuracy of detecting the displacement amount of the water tub can be improved, so that the accuracy of detecting the laundry capacity can be improved. Further, since the oscillator including the coil as a component can be manufactured at low cost, it is possible to suppress an increase in the manufacturing cost of the drum type washing machine.

According to a third aspect of the invention, the drum type washing machine is characterized in that the control means displays the amount of detergent used in accordance with the laundry capacity detected by the laundry capacity detecting means.
According to such a configuration, the user can know the appropriate amount of detergent to be used according to the laundry capacity. In addition, since the laundry can be washed with an appropriate amount of the detergent, it is possible to prevent the detergent from being wastefully used, and it is also possible to prevent a decrease in the stain removal of the laundry due to a shortage of the detergent.

According to a fourth aspect of the present invention, the drum type washing machine is characterized in that the control means displays the amount of water used according to the laundry capacity detected by the laundry capacity detecting means. According to such a configuration, the user can know an appropriate amount of used water according to the laundry capacity. In addition, since it is possible to wash with an appropriate amount of water, it is possible to prevent wasteful use of water, and it is possible to prevent a decrease in dirt of laundry due to a shortage of water.

According to a fifth aspect of the present invention, there is provided a drum type washing machine comprising: a detergent charging case for charging a detergent into a water tub; and an open / closed state detecting means for detecting an open / closed state of the detergent charging case and outputting an open / close signal. The control means determines whether or not to shift to the next stroke based on the opening / closing signal. According to such a configuration, it can be estimated that the displayed used detergent amount has been put into the detergent feeding case by the user. Further, it is possible to prevent the washing from being performed while the detergent input case is in the open state.

According to a sixth aspect of the present invention, there is provided a drum type washing machine including a detergent type setting means for setting a type of detergent to be used, and a control means for controlling a laundry capacity with respect to the detergent set by the detergent type setting means. The amount of detergent used is displayed according to the laundry volume detected by the detecting means. According to such a configuration, the user can know the appropriate amount of detergent to be used according to the type of detergent to be used. In addition, the washing can be performed with the detergent amount that further reduces waste.

According to a seventh aspect of the present invention, in the drum type washing machine, the control means performs a specific display when the laundry capacity detected by the laundry capacity detecting means exceeds an allowable amount. According to such a configuration, for example, it is possible to notify the user that the laundry capacity exceeds the allowable amount. Thus, the user can adjust the laundry capacity to be equal to or less than the allowable amount according to the display, so that it is possible to prevent the drum from rotating in an overload state.

The drum type washing machine according to the present invention is characterized in that the control means displays a margin to a permissible amount with respect to the laundry capacity detected by the laundry capacity detecting means. According to such a configuration, the user can put the laundry into the drum while checking the surplus amount, so that the washing efficiency can be improved.

According to a ninth aspect of the present invention, in the drum type washing machine, the coil and the magnetic body are mounted on one vertical line so that the magnetic body is stationary on the center axis of the coil when the outer box is installed horizontally. It is characterized by being configured to be visible. According to such a configuration, since the coil and the magnetic body can be used as a level, the drum type washing machine can be installed horizontally when it is installed.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A first embodiment in which the present invention is applied to a drum type washing machine equipped with a washing operation function comprising a washing step, a rinsing step, a dehydrating step and a drying step will be described below.
Will be described with reference to FIGS. First, the mechanical configuration of the drum type washing machine will be described with reference to FIG.

FIG. 2 is a longitudinal sectional view of the drum type washing machine 1. In FIG. 2, a detergent charging case 2 described later is used.
In order to show the structure of No. 3, the installation position is actually different from this vertical sectional view, but the vertical sectional view is also shown for convenience of explanation. In FIG. 2, in the center of the front plate of the outer box 2,
A cylindrical entrance 3 for taking in and out of the laundry is formed, and a door 4 is attached along the entrance 3 so as to be openable and closable. A rectangular work opening 5 is formed in the rear face plate of the outer box 2, and a cover 6 is attached so as to cover the work opening 5.

A cylindrical water tank 7 is provided in the outer case 2 such that the axial direction thereof coincides with the front-rear direction of the outer case 2. That is, a support plate 8 is mounted on the water tank 7, and the water tank 7 is elastically supported on the bottom of the outer box 2 by four dampers 9 described later via the support plate 8. Also,
A drain port (not shown) is provided at the bottom of the water tank 7, and the drain hose 1 is connected to the drain port through a drain valve 10.
1 is connected.

Inside the water tub 7, a rotary tub 12, which is also cylindrical and has an outer diameter smaller than the inner diameter of the water tub 7, is rotatable as a horizontal axis whose axial direction coincides with the water tub 7. Are located in A plurality of holes 13 used as water holes and air holes are formed in the peripheral wall of the rotary tank 12. A drive mechanism 14 for controlling the rotation of the rotary tub 12 by a control circuit 19 serving as control means described later is mounted on the back plate of the water tub 7. This drive mechanism 1
4 is a rotor 1 having a stator 15 and a shaft 16
An outer rotor type brushless motor (hereinafter, simply referred to as a motor) 18 comprising the main body 7 is mainly constituted, and a shaft 16 is connected to a central portion of a rear end of the rotary tub 12. And, the rotating tub 1 is provided on the stator 15.
Magnetic pole position sensors 64u and 64v (see FIG. 4) for detecting the rotational position of the second motor 2 are mounted.

At the upper left of the front panel of the outer box 2, a case housing chamber 21 having a front opening is provided. Inside the case housing chamber 21, a rectangular container-like detergent charging case 23 having an upper surface opening is provided. It is housed so that it can be pulled out. A handle 24 is provided on a front portion of the detergent charging case 23.
In the drum-type washing machine 1, the detergent is manually supplied to the detergent supply case 23 by a user, and water is supplied from a detergent water supply port (not shown) at the beginning of the washing operation. The detergent in the charging case 23 is charged into the rotary tank 12 together with the water.

A magnet 25a is mounted on the inner wall of the detergent charging case 23, and a reed switch 25b which is turned on and off by the magnetic force of the magnet 25a is mounted on the inner wall of the case accommodating chamber 21. The magnet 25a and the reed switch 25b constitute an open / closed state detecting circuit 25 as open / closed state detecting means. The reed switch 25b is turned on when the detergent charging case 23 is in the closed state when inserted into the case accommodating chamber 21. When the detergent input case 23 is in the open state where the detergent input case 23 is pulled out of the case storage chamber 21, the switch is turned off. Although details will be described later, the reed switch 25b is connected to a control circuit 19 described later, and the control circuit 19 detects on / off of the reed switch 25b.

An electronic unit 30 (see FIG. 1) equipped with a panel 29 on the front of which an operation switch 27 and a display unit 28 (see FIG. 5) are mounted is provided at the upper center of the front panel of the outer box 2. It is installed. The electronic unit 30 incorporates a driving device 31 described later. Panel 2
9, as an operation switch 27, as shown in FIG.
A start button 27a, a washing condition setting button 27b for setting washing conditions, a washing process, a rinsing process,
A process-specific setting button 27c for individually setting the dehydration process and the drying process is mounted.
A display panel unit 28a for displaying washing information such as the amount of detergent used and washing time, a washing condition display unit 28b for displaying set washing conditions and the like, and a water amount display unit 28c for displaying the amount of water used during the washing process are installed. Have been. A not-shown indicator light is mounted below the stroke-specific setting button 27c and the washing condition display section 28b, and while the operation of each stroke is being executed by a command from the control circuit 19, the stroke-specific setting for the stroke is performed. The indicator light below the character of the button 27c blinks, and the indicator light below the character of the washing condition display section 28b relating to the operation is turned on.

FIG. 1 shows the structure of the drum type washing machine 1.
FIG. 4 shows a rear view in a state where a rear plate is removed from the outer box 2. In FIG. 1, only one damper 9a is shown in a longitudinal sectional view to show the internal structure of the damper 9.

In the damper 9 (9a), one end of a spring 33 is mounted on one end in the cylinder 32, and a piston 34 is mounted on the other end of the spring 33. A shaft 35 is mounted on a surface of the piston 34 on which the spring 33 is not mounted.
Is formed so as to be sealed and protrude to the outside of the cylinder 32. The cylinder 32 is filled with oil 36, and a small hole (not shown) is formed in the piston 34 in a direction parallel to the vertical movement direction of the piston 34. The small hole serves as a buffer so that even when a sudden pressing force is applied to the damper 9, the oil 36 flows through the small hole and the piston 34 moves slowly. The tip of the shaft 35 is
A fixing member 37 attached to the end of the cylinder 32 where the shaft 35 does not protrude is fixed to the bottom of the outer box 2 by screwing. In this way, the water tank 7 is elastically supported on the bottom of the outer box 2 by the four dampers 9 via the support plate 8.

As shown in FIG. 4, a coil 38 formed by winding a conductive wire is mounted on the outer peripheral wall of the cylinder 32 of one damper 9b on the rear side of the outer box 2.
In the vicinity of the support plate 8 to which the shaft 35 of the damper 9b is screwed and fixed, a magnetic body 40 formed in a columnar shape having a smaller outer diameter than the inner diameter of the coil 38 and having a length of, for example, 20 mm is provided with a wire 39. The length of the wire 39 is adjusted so that a portion of the magnetic body 40 up to 4 mm from the front end is inserted into the coil 38 when there is no laundry in the rotating tub 12. . When 7 kg of laundry is put into the rotating tub 12, the elastic force of the damper 9 and the water tub 7 and the rotating The weight of the tank 12 and the like is adjusted.

Next, the electrical configuration of the drum type washing machine 1 will be described with reference to FIGS. First, FIG. 5 schematically shows an electric block configuration of the drum type washing machine 1. An AC input terminal of a rectifying bridge circuit 52 is connected to the commercial power supply 50 via a coil 51 for reducing high-frequency noise. The DC output terminal of the rectifier bridge circuit 52 is connected to buses 53 and 54. Between buses 53 and 54, capacitors 55 and 5
6 is connected to the power input terminal of the constant voltage circuit 58, and the common connection point of the capacitors 55 and 56 is connected to the DC input terminal of the rectifier bridge circuit 52 on the side where the coil 51 is not connected. It is connected. In the constant voltage circuit 58, a DC power supply for driving the control circuit 19 and the like is generated and output to the control circuit 19 and the like.

Between the buses 53 and 54, six I
GBTs 59a to 59f are connected in a three-phase bridge,
Flywheel diode 6 for GBTs 59a to 59f
0a to 60f are connected in parallel.
59a to 59f and flywheel diode 60a
The inverter circuit 61 is constituted by the components 60f to 60f. The AC output terminal of the inverter circuit 61 is connected to the power supply voltage line 6
The motor 18 is connected through 2u to 62w.

The control circuit 19 is composed of an electric circuit mainly composed of a microcomputer not shown (hereinafter simply referred to as a microcomputer), and all programs of the entire drum type washing machine 1 are controlled by a program written in the microcomputer. Electrical control is performed. In the control circuit 19, a drive signal for driving the motor 18 is generated and output to the gates of the IGBTs 59 a to 59 f via the drive circuit 63 to control the rotation of the rotary tub 12. The control circuit 19 receives signals output from the magnetic pole position sensors 64u and 64v mounted on the motor 18 and detects the number of rotations of the rotary tub 12.
By performing feedback control based on the detected rotation speed, the accuracy of the rotation control of the rotary tub 12 is improved.

In the control circuit 19, the operation switch 2
Various settings such as a washing process are performed in response to the output from the controller 7. Then, while performing the set washing process and the like, it is collectively displayed as the electrical component 65 in FIG. 5, but the drain valve 10, the water supply valve, the softer valve, the heater, the fan motor, the power failure detection circuit, the water level sensor, Drive control of a door lock switch (not shown) is performed. In addition, at the time of various settings and the execution of the washing operation, the display unit 28 displays washing information such as the amount of detergent used and washing time as needed. Also, the control circuit 1
In 9, an oscillation signal output from an oscillation circuit 66, which will be described later, and a conduction state of a reed switch 25 b included in the open / closed state detection circuit 25 are detected.

As will be described in detail later, a laundry capacity detecting means 68 for detecting the laundry capacity is programmed and written in the control circuit 19. Also,
As data necessary for detecting the laundry capacity, the relationship between the insertion length of the magnetic body 40 with respect to the coil 38 and the oscillation frequency of the oscillation circuit 66 and the correspondence relationship between the insertion length and the laundry volume are recorded in advance. ing. Further, the drum-type washing machine 1 has a function of displaying the amount of detergent used and the amount of water used during the washing process according to the detected laundry capacity. Therefore, these are displayed on the control circuit 19. The correspondence between the laundry capacity in each washing course and the used detergent amount and the used water amount is also recorded in advance as necessary data.

FIG. 6 shows the configuration of the oscillation circuit 66. A coil 38 is connected to the oscillating circuit 66, and the oscillating frequency is changed according to an inductance component of the coil 38. The coil 38 and the oscillation circuit 66 constitute a displacement detection circuit 67 (see FIG. 5) as displacement detection means. Since the coil 38 is configured such that the inductance component changes according to the correlation between the position of the coil 38 and the magnetic body 40, the oscillation frequency of the oscillation circuit 66 changes depending on the position of the coil 38 and the magnetic body 40. This oscillation signal is output to the control circuit 19. The control circuit 19 detects the oscillation frequency of the oscillation signal by sampling the oscillation signal at a sampling frequency higher than the oscillation signal, and the laundry capacity detection means 68 detects the oscillation frequency based on the detected oscillation frequency. The detected laundry capacity is detected.

As described above, the rectifying bridge circuit 52, the constant voltage circuit 58, the inverter circuit 61, the drive circuit 63, the motor 18, the magnetic pole position sensors 64u and 64v, the control circuit 19, the electrical component 65, and the operation switch 2
7, the display unit 28, the displacement amount detection circuit 67, and the open / closed state detection circuit 25 constitute the driving device 31.

Next, the operation of the first embodiment will be described with reference to FIG.
First, the operation of the laundry capacity detecting means 68 will be described with reference to FIGS. In the drum type washing machine 1, the maximum rating of the laundry capacity that can be put into the rotating tub 12 in the washing step, the rinsing step, and the dehydration step is 7 kg, and the maximum rating in the drying step is 4 kg. .

FIG. 7 shows how the oscillation frequency of the oscillation circuit 66 changes with respect to the positional relationship between the coil 38 and the magnetic body 40. In FIG. 7, the horizontal axis indicates the insertion length [mm] of the magnetic body 40 with respect to the coil 38 (that is, the inductance component of the coil 38), and the vertical axis indicates the oscillation frequency [kHz] of the oscillation circuit 66 corresponding thereto. ]It is shown. The horizontal axis also shows the correspondence between the insertion length of the magnetic body 40 with respect to the coil 38 and the laundry capacity [kg]. The relationship between the insertion length of the magnetic body 40 with respect to the coil 38 and the laundry capacity is shown. There is no laundry in the rotating tub 12 (0 kg)
The insertion length in the state (4 mm: hereinafter referred to as zero point)
Is associated with the insertion length (16 mm) in a state where 7 kg of laundry is put into the rotating tub 12. As described above, the insertion length and the oscillation frequency of the oscillation circuit 66 have a one-to-one relationship, and the region where the rate of change of the oscillation frequency is large is set as the laundry capacity detection range.

In the laundry capacity detecting means 68, the control circuit 1
9 by referring to the relationship between the insertion length and the oscillation frequency of the oscillator 66, which are recorded in advance, and the correspondence between the insertion length and the laundry capacity, based on the frequency of the detected oscillation signal. The insertion length is detected, and the laundry capacity is detected based on the detected insertion length. However, the zero point as a reference when there is no laundry in the rotating tub 12 may vary depending on the installation environment of the drum type washing machine 1 and the number of years of use, so the zero point adjustment is performed at the start of each washing. This zero point adjustment detects the oscillation frequency of the oscillator 66 in a state where there is no laundry in the water tub 12 at the start of each washing, and there is a difference between the oscillation frequency recorded as the zero point and the detected oscillation frequency. In this case, the relationship between the oscillation frequency and the laundry capacity is corrected by moving the oscillation frequency recorded by the difference between the oscillation frequencies in parallel. By this correction, the laundry capacity can be accurately detected.

Next, the washing operation of the drum type washing machine 1 will be described with reference to the flowchart of FIG. In the drum type washing machine 1, the combination of the rotation control method and the execution time of the rotating tub 12 in the washing step, the rinsing step, the dewatering step and the drying step is changed according to the target laundry, as shown in FIG. "Standard", like
A plurality of washing courses such as "easy" and "firm" are configured, and these washing courses can be set. Further, in the drum type washing machine 1, the laundry capacity is detected at the start of washing, and based on the detected laundry capacity, appropriate amounts of detergent and water used during the washing process are displayed. It has become. Hereinafter, the operation of the control circuit when “standard” is selected as the washing course will be described.

In step S1, when the user presses the start button (see FIG. 3), the supply of the commercial power supply 50 to the control means 31 is started, and the process proceeds to step S2. In step S2, all the electric systems are initialized by the control circuit 19, and the process proceeds to step S3.

In step S3, zero point adjustment is performed. First, on the assumption that there is no laundry in the rotating tub 12, the oscillation frequency is detected based on the oscillation signal received from the oscillation circuit 66, and the detected oscillation frequency and the recorded zero point are measured. A comparison with the oscillation frequency is made. Then, by correcting the deviation between the detected oscillation frequency and the recorded oscillation frequency at the zero point, the oscillation circuit 66
Is corrected for the relationship between the oscillation frequency and the laundry capacity.
When the zero point adjustment is completed normally in this way, the user is notified by a buzzer sound, and the user puts the laundry into the rotating tub 12. Then, control goes to a step S4.

In step S4, the user sets a washing course. This setting is performed by switching the washing course by pressing a course button in the washing condition setting button 27b (see FIG. 3), and the washing condition display section 28b
As for the characters of each washing course in (see FIG. 3), any one of the washed courses is lit and displayed.
Then, the lit-up character is set as the washing course. In the present embodiment, a standard course is set (lit and displayed) as shown in FIG. Then, control goes to a step S5.

In step S5, it is determined whether or not the user has pressed the start button 27a (see FIG. 3). If the user has not pressed the start button 27a, the process loops in step S5, and the process proceeds to step S6 when pressed. In step S6, the laundry capacity is detected. The water tank 7 is a rotating tank 1
When the laundry is put into the laundry 2, the laundry is displaced with respect to the outer box 2 in accordance with the laundry capacity. With this, coil 3
The position of the magnetic body 40 with respect to 8 also changes, and the inductance component of the coil 38 also changes, so that the oscillation frequency of the oscillation signal output from the oscillation circuit 66 changes. Control circuit 1
At 9, the laundry capacity is detected based on the detected oscillation frequency. Then, control goes to a step S7.

In step S7, the used detergent amount and the used water amount are detected based on the detected laundry volume, and the detected used detergent amount is displayed on the display panel section 28a.
The used water amount is displayed on the water amount display section 28c. Table 1 shows the correspondence between the laundry capacity, the used detergent amount, and the used water amount during the washing process in the standard course recorded in the control circuit 19. FIG. 3 shows a display example when the amount of detergent used during the washing process is 0.9 cup and the amount of water used is 16 liters. Then, step S8
Move to

[0041]

[Table 1]

In step S8, the timer provided in the control circuit 19 is reset to zero, and the flow shifts to step S9. In addition, after step S9, the detergent charging case 23
This is an operation of detecting the open / closed state of the washing machine and determining whether or not to shift to the next washing operation. In this drum-type washing machine 1, the detergent input case 23 is set to 30 when the amount of used detergent and the amount of used water are displayed on the display unit 28 as a reference.
If it has been closed for 2 seconds, it is determined that the detergent has already been put into the rotating tank 12, or that the detergent is not used,
It shifts to water supply (washing process). Also,
When the detergent input case 23 is opened and closed again within the 30 seconds, it is determined that the detergent has been input into the detergent input case 23, and when the detergent input case 23 is closed, the process shifts to water supply (washing process). I have. If the 30 seconds have elapsed with the detergent input case 23 once opened, it is determined that the user has forgotten to close the detergent input case 23, an alarm is issued to alert the user, and water supply ( (Washing process).

In step S9, the open / close state of the detergent charging case 23 is detected. This is performed by detecting the on / off state of the reed switch 25b in the open / closed state detection circuit 25. When the on state is detected, it is determined that the detergent introduction case 23 is closed (the detergent has not been introduced yet). Then, the process proceeds to step S10, and when OFF is detected, it is determined that the detergent introduction case 23 is open (during the introduction of the detergent), and the process proceeds to step S13. Step S
At 10, the timer time is counted up, and the routine goes to Step S11.

In step S11, it is determined whether the timer time has reached 30 seconds. If the timer time has not reached 30 seconds, the process returns to step S9. If the timer time has reached 30 seconds, the detergent is already in the rotary tank 12. Or the detergent is not used, and the process proceeds to step S12. In step S12, the washing process is started, and water is supplied from the detergent water inlet into the water tank 12. Then, the washing is performed according to the set washing course (standard course). In step S13, as in step S10,
The timer time is counted up, and the routine goes to Step S14.

In step S14, the open / close state of the detergent charging case 23 is detected in the same manner as in step S9. If it is determined that the detergent is closed, it is determined that the detergent has been charged into the detergent charging case 23, and the process proceeds to step S12. If it is determined that the detergent is open, the process proceeds to step S12.
Move to 15. In step S15, step S11
Similarly to the above, it is determined whether the timer time has reached 30 seconds. If the timer time has not reached 30 seconds, the process proceeds to step S13.
When the time has reached 30 seconds, it is determined that the user has forgotten to close the detergent charging case 23, and the process proceeds to step S16. In step S16, the display unit 28
An alarm indicating that the detergent charging case 23 is open is displayed, and a user is notified by a buzzer sound. Then, control goes to a step S8.

As described above, in the first embodiment, the coil 38 is mounted on the cylinder 32 which is a stationary part, and the magnetic body 40 is mounted on the support plate 8 which is displaced together with the water tank 7, so that the magnetic tank 40 is put into the rotary tank 12. Outer box 2 according to the laundry capacity
Is converted into a displacement of the positional relationship between the coil 38 and the magnetic body 40 to change the inductance component of the coil 38. An oscillation circuit 66 whose oscillation frequency changes in accordance with the inductance component of the coil 38 is configured, and a region where the rate of change of the oscillation frequency is large is set as a detection range, and an oscillation signal output from the oscillation circuit 66 is output. Is detected by the control circuit 19 to detect the capacity of the laundry in the rotating tub 12.

According to such a configuration, the displacement of the water tub 7 with respect to the outer case 2 can be instantaneously detected as a change in the frequency of the oscillation signal.
Washing time can be reduced. Moreover, by setting the region where the rate of change of the oscillation frequency of the oscillation circuit 66 is large as the detection range, the accuracy of detecting the displacement of the water tub 7 with respect to the outer case 2 can be improved, and the accuracy of detecting the capacity of the laundry can be improved. be able to. Also, an oscillation circuit 66 composed of the coil 38
Can be manufactured at low cost, and the laundry capacity can be detected in a short time and with high accuracy while suppressing an increase in the manufacturing cost of the drum-type washing machine 1.

Further, the amount of detergent used and the amount of water used during the washing process are displayed on the display unit 28 in accordance with the detected laundry capacity, so that the user can use the appropriate amount of detergent according to the laundry capacity. And the amount of water used. Moreover,
Since the laundry can be washed with the proper amount of detergent and water, it is possible to prevent the detergent and water from being wastefully used, and to prevent the laundry from becoming dirty due to insufficient amounts of detergent and water. Further, by detecting whether or not the user has put the detergent into the detergent charging case 23 by detecting the open / close state of the detergent charging case 23, the washing is performed with the detergent charging case 23 opened. Can be prevented.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS.
The same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof will be omitted, and only different parts will be described below. Further, the drum type washing machine 70 of the second embodiment includes:
It is assumed that the function to display the amount of water used has not been added.

As shown in FIG. 8, the outer box 2 which is a stationary portion
At the upper end of the cylinder 72 of one of the dampers 71 on the rear side, a coil 74 formed by winding a conductive wire so as to penetrate the shaft 73 therein is mounted.
In addition, on the outer peripheral wall of the shaft 72 displaced together with the water tank 7,
A magnetic body 75 having a smaller outer diameter than the inner diameter of the coil 74 and having a cylindrical shape with a length of, for example, 20 mm is mounted. The mounting position of the magnetic body 75 on the shaft 73 is adjusted so that a portion of the magnetic body 75 up to 4 mm from the tip thereof is inserted into the coil 74 when there is no laundry in the rotating tub 12. And, 7 kg
When the laundry is put in, the elastic force of the damper 71 and the weight of the water tub 7 and the rotary tub 12 are adjusted so that a portion of the magnetic body from the tip to 16 mm is inserted into the coil. I have.

By the way, in the drum type washing machine 70,
A function is provided in which the type of detergent to be used can be set, and the amount of detergent used for the set detergent is displayed according to the detected laundry capacity. The function of setting these detergent types and the function of displaying the detergent usage according to the detergent type are as follows.
This is realized by rewriting the program contents of the microcomputer in the control circuit 19 shown in the first embodiment.

FIG. 10 shows operation switches and a display unit (not shown) on the panel 76 of the drum type washing machine 70. These operation switches and the display unit are the same as the operation switches 27 and the display unit 28 shown in the first embodiment. As the operation switches, a start button 77a and a washing condition setting button for setting washing conditions are used. 77b and stroke setting buttons 77c for individually setting a washing process, a rinsing process, a dehydrating process, and a drying process.
And a display panel unit 78a for displaying laundry information such as the amount of detergent used and the washing time, and a laundry condition display unit 78b for displaying set laundry conditions and the like.

Further, in the washing condition setting button 77b, there is provided a detergent button 79 for selecting and setting three different kinds of detergents, ie, a powdery synthetic detergent, a liquid detergent and a powdered soap. Detergent type display characters ("powder", "liquid" and "soap") 80 for displaying the set detergent are provided in the washing condition display section 78b. The detergent button 79 and the detergent type display character 80 constitute a detergent type setting means 81. still,
An indicator light (not shown) is mounted below the detergent type display character 80, and the indicator light below the set detergent type display character 80 is turned on.

Next, the operation of the second embodiment will be described. The description of the same operation as in the first embodiment will be omitted, and the function of setting the added detergent type and the function of the detergent type will be described below. Only the function of displaying the used detergent amount will be described. First, at the start of washing, the user sets the type of detergent to be used when setting a washing course. This setting is performed by switching the detergent type by pressing the detergent button 79 and lighting up and displaying the character of the detergent to be used. FIG. 10 shows a display example when the liquid detergent is set (lighted display).

In the control circuit 19, the correspondence between the laundry capacity and the used detergent amount when each detergent is used in each washing course is recorded in advance, and the control circuit 19 detects when the laundry capacity is detected. Then, the used detergent amount of the detergent set based on the recorded correspondence and the detected laundry capacity is detected and displayed on the display panel section 78a.
Table 2 shows the correspondence between the laundry capacity and the used detergent amount when each detergent is used in the standard course recorded in the control circuit 19. FIG. 10 shows a display example when the used amount of the liquid detergent is 1.0 cup.

[0056]

[Table 2]

As described above, in the second embodiment, the coil 74 is mounted on the cylinder 72, which is a stationary part, and the magnetic body 75 is mounted on the shaft 73 which is displaced together with the water tank 7, so that the drum type washing machine is used. When manufacturing the drum-type washing machine 70, it is not necessary to separately mount the coil 74 and the shaft 73, and the manufacturing process of the drum-type washing machine 70 can be simplified. Further, in the control circuit 19, the used detergent amount is displayed on the display unit in accordance with the set detergent type and the detected laundry volume, so that the user can take an appropriate amount in accordance with the type of detergent to be used. You can know the amount of detergent used.
As a result, the laundry can be washed with a less wasteful detergent amount.

[Third Embodiment] Next, a third embodiment of the present invention will be described with reference to FIGS.
The same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof will be omitted, and only different parts will be described below. The drum-type washing machine 90 of the third embodiment includes:
It is assumed that the function to display the amount of water used has not been added.

First, as shown in FIG. 11, a columnar magnetic body 92 having a length of, for example, 20 mm is suspended by a wire 91 on a support plate 8 displaced together with the water tank 7. A coil 93 formed by winding a conductive wire so that the outer diameter is larger than the inner diameter of the magnetic body 92 is formed.
Is mounted on the bottom of the outer case 2 such that the magnetic body 92 is stationary on the center axis of the coil 93 when the outer case 2 is installed horizontally. Are arranged on two vertical lines. The length of the wire 91 is adjusted so that a portion of the magnetic body 92 up to 4 mm from the tip portion is inserted into the coil 93 when there is no laundry in the rotating tub 12. When 7 kg of laundry is thrown into the coil 91, the portion of the magnetic body 91 from the tip to 16 mm is
The elastic force of the damper 9 and the weight of the water tank 7 and the rotating tank 12 are adjusted so that the damper 9 is inserted into the damper 9. Although not shown, an opening covered with a transparent plate is provided on the rear side wall of the outer box 2 near the position where the coil 93 and the magnetic body 92 are installed so that the positional relationship between the coil 93 and the magnetic body 92 can be visually recognized. A part is formed.

By the way, in the drum type washing machine 90,
When the laundry capacity detected at the start of washing exceeds the maximum rating, which is an allowable amount, a function is provided to issue an alarm to alert the user. Further, a function of detecting a margin until the detected laundry capacity reaches the maximum rating and displaying the margin on a display panel section 96a described later in real time is added. The alarm output function and the margin display function are realized by rewriting the program contents of the microcomputer in the control circuit 19 shown in the first embodiment.

FIG. 12 shows operation switches and a display unit (not shown) on the panel 94 of the drum type washing machine 90. These operation switches and the display unit are the same as the operation switches 27 and the display unit 28 shown in the first embodiment. As the operation switches, a start button 95a and a washing condition setting button for setting washing conditions 95b and stroke-specific setting buttons 95c for individually setting a washing process, a rinsing process, a dehydrating process, and a drying process.
The display panel 96a displays washing information such as the amount of detergent used and the washing time, and the washing condition display 96b displays the set washing conditions and the like.

Further, in the washing condition display portion 96b, a margin display character ("additional k") for indicating the display of the margin is displayed.
g ") 97 is added. The margin is displayed on the display panel section 96a. In addition, an alarm when the laundry capacity exceeds the maximum rating is indicated by, for example, a character indicating an overrange.
6a.

Next, the operation of the third embodiment will be described. The description of the same operation as in the first embodiment will be omitted, and only the added alarm output function and margin display function will be described below. This will be described with reference to the flowchart of FIG. In this drum type washing machine 90, the washing process,
The maximum rating of the laundry capacity in the rotating tub 12 during the rinsing step and the dehydration step (hereinafter referred to as a washing / washing capacity) is 7 kg, and the maximum rating in the drying step (hereinafter referred to as a drying rated capacity). Is 4 kg.

In FIG. 13, the operation from step S1 to step S6 is the same as that described in the first embodiment, and a description thereof will be omitted. In step T1,
It is determined whether or not the drying course is included in the washing course set in step S4. If the drying process is included, the process proceeds to step T2; otherwise, the process proceeds to step T7. In step T2,
It is determined whether the detected laundry capacity exceeds the rated dry capacity. If the laundry capacity exceeds the rated dry capacity, the process proceeds to step T6; otherwise, the process proceeds to step T3.

At step T3, an allowable amount is detected when the washing course includes a drying step. Specifically, a value obtained by subtracting the detected laundry capacity from the rated dry capacity (4 kg) is detected as the allowable amount. Then, control goes to a step T4. In step T4, the detected permissible amount is displayed on the display panel unit.
Move to 5. In step T5, it is determined whether the user has pressed the start button 95a. When the start button 95a is pressed, it is determined that the loading of the laundry into the rotating tub 12 has been completed, and a transition to the next washing step is performed. If the button is not pushed, the loop to step T2 is repeated to shift to the washing process, or the permissible amount is displayed in real time until the laundry capacity exceeds the rated dry capacity.

At step T6, a buzzer sounds and an alarm (drying disabled) is displayed on the display panel 96a to notify the user that the laundry capacity exceeds the rated dry capacity. Then, after a lapse of a predetermined time, the process proceeds to step T2. In step T7, it is determined whether the detected laundry capacity exceeds the rated washing capacity. If the laundry capacity exceeds the rated washing capacity, the process proceeds to step T11, and if not, the process proceeds to step T8. In step T8, the allowable amount is detected when the drying course is not included in the washing course. Specifically, a value obtained by subtracting the detected laundry capacity from the rated washing capacity (7 kg) is detected as an allowable amount. Then, control goes to a step T9. In step T9, the detected permissible amount is displayed on the display panel, and the process proceeds to step T10.

In step T10, it is determined whether the user has pressed the start button 95a. When the start button 95a is pressed, it is determined that the loading of the laundry into the rotating tub 12 has been completed, and a transition to the next washing step is performed. If it is not pressed, the process proceeds to the washing step by repeating the loop of step T7, or the permissible amount is displayed in real time until the laundry capacity exceeds the rated washing capacity. In step T11, a buzzer sounds and a buzzer sounds to notify the user that the laundry capacity exceeds the rated washing capacity.
An alarm (impossible to wash) is displayed on the display panel section 96a. Then, after a lapse of a predetermined time, the process proceeds to step T7.

As described above, in the third embodiment, the coil 9
The coil 93 was mounted on the bottom of the outer box 2 so that the central axes of the magnetic material 3 and the magnetic material 92 were on one vertical line, and the magnetic material 92 was mounted on the support plate 8 displaced together with the water tank 7. 93 and the magnetic body 92 can also be used as a level. Therefore, when the drum-type washing machine 90 is installed, by using this level, the drum-type washing machine 90 can be installed in a horizontal state.

When the laundry capacity exceeds the maximum rating (permissible amount), an alarm is displayed on the display section, so that the user is notified that the laundry capacity exceeds the maximum rating. I can let you know. This allows the user to adjust the laundry capacity to be equal to or less than the maximum rating according to the alarm display, thereby preventing the rotating tub 12 from rotating in an overloaded state. In addition, since the amount of allowance until the capacity of the laundry in the rotating tub 12 reaches the maximum rating is displayed on the display unit in real time, the user can put the laundry into the rotating tub 12 while checking the amount of excess. To increase the washing efficiency.

The present invention is not limited to the embodiment described above and shown in the drawings.
Extension is possible. In the embodiment of the present invention, the used detergent amount and the used water amount are displayed in the first embodiment, and the used detergent amount corresponding to the detergent type is displayed in the second embodiment.
In the above embodiment, the amount of detergent used, the allowable amount, and the surplus amount are displayed, but these display functions may be provided in any combination as needed.

In the embodiment of the present invention, the present invention is applied to a drum type washing machine capable of performing a washing step, a rinsing step, a dehydrating step, and a drying step as a washing step. However, the present invention is not limited to this. Any executable drum type washing machine may be used. In the third embodiment of the present invention, the margin is displayed in real time. However, the present invention is not limited to this. The margin may be displayed by using a button or the like as a trigger.

In the embodiment of the present invention, the magnetic material is suspended by a wire. However, the present invention is not limited to this. For example, the bottom of the suspended magnetic material may be attached to the bottom of the outer box by a wire or the like. A connection may be made so as to suppress the swinging of the magnetic body in the left-right direction. In short, the coil is mounted on the outer box or other stationary part, and the magnetic body is mounted on the water tank or a part displaced with it, so that the displacement of the water tank with respect to the outer box according to the laundry capacity is determined by the inductance component of the coil. What is necessary is just to comprise so that it can be detected as a displacement. Therefore, the magnetic body may be mounted on the outer box or other stationary part, and the coil may be mounted on the water tank or a part displaced therewith.
In the embodiment of the present invention, the water tank is supported by the damper. However, the present invention is not limited to this. The present invention can be applied to all elastic tanks.

[0073]

As is apparent from the above description, in the drum type washing machine of the present invention, the displacement of the water tub with respect to the outer box according to the capacity of the laundry put into the rotating tub is determined by the positional relationship between the coil and the magnetic material. The displacement of the water tank with respect to the outer box is instantaneously determined as the change in the oscillation frequency because the capacity of the laundry in the rotating tub is detected by converting the oscillation frequency according to the inductance component of the coil. , And the laundry capacity can be detected instantaneously.
In addition, by setting the region where the rate of change of the oscillation frequency is large as the detection range, the accuracy of detecting the displacement of the water tank with respect to the outer box can be improved, and the accuracy of detecting the capacity of the laundry can be improved. Therefore, the laundry capacity can be detected in a short time and with high accuracy.

[Brief description of the drawings]

FIG. 1 is a rear view of a drum type washing machine showing a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a drum type washing machine.

FIG. 3 is a configuration diagram of a panel.

FIG. 4 is a diagram showing a state of installation of a coil and a magnetic body.

FIG. 5 is a block diagram of a control unit.

FIG. 6 is a configuration diagram of a displacement amount detection unit.

FIG. 7 is a diagram showing a relationship between an oscillation frequency of an oscillation circuit and a laundry capacity;

FIG. 8 is a flowchart showing the operation of the drum type washing machine at the start of washing.

FIG. 9 is a view corresponding to FIG. 4, showing a second embodiment of the present invention;

FIG. 10 is a diagram corresponding to FIG. 3;

FIG. 11 is a view corresponding to FIG. 4, showing a third embodiment of the present invention;

FIG. 12 is a diagram corresponding to FIG. 3;

FIG. 13 is a diagram corresponding to FIG. 8;

[Explanation of symbols]

In the drawings, 1, 70 and 90 are drum type washing machines, 2 is an outer box,
7 is a water tank, 9, 9a, 9b and 71 are dampers, 12 is a rotating tank (drum), 14 is a drive mechanism, 18 is a motor (brushless motor), 19 is a control circuit (control means), 23 is a detergent charging case, 25a is a magnet, 25b is a reed switch, 25 is an open / closed state detecting circuit (open / closed state detecting means), 27 is an operation switch, 28 is a display unit, 29, 7
6, 94 is a panel, 31 is a driving device, 38, 74, 93
Is a coil, 40, 75, 92 are magnetic materials, 66 is an oscillation circuit, 67 is a displacement detection circuit (displacement detection means), and 68 is a laundry capacity detection means.

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] September 19, 2000 (2009.1.
9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

[0007] According to such a configuration, the amount of displacement of the water tank with respect to the outer box according to the loading of the laundry into the drum can be instantaneously detected as a change in the oscillation frequency of the oscillator. In addition, by setting the region where the rate of change of the oscillation frequency is large as the detection range, the accuracy of detecting the displacement amount of the water tub can be improved, so that the accuracy of detecting the laundry capacity can be improved. Further, since the oscillator including the coil as a component can be manufactured at low cost, it is possible to suppress an increase in the manufacturing cost of the drum type washing machine.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

According to a third aspect of the invention, the drum type washing machine is characterized in that the control means displays the amount of detergent used in accordance with the laundry capacity detected by the laundry capacity detecting means.
According to such a configuration, the detection of the laundry capacity is started and
From the display of the amount of detergent used can be shortened.
Can, this way the user can know the proper use amount of detergent according to the laundry capacity at an early stage. In addition, since the laundry can be washed with an appropriate amount of the detergent, it is possible to prevent the detergent from being wastefully used, and it is also possible to prevent a decrease in the stain removal of the laundry due to a shortage of the detergent.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

According to a fourth aspect of the present invention, the drum type washing machine is characterized in that the control means displays the amount of water used according to the laundry capacity detected by the laundry capacity detecting means. According to such a configuration, the detection of the laundry capacity is started.
From the display of the amount of water used can be shortened,
In this way the user can know the proper amount of water used in accordance with the laundry capacity at an early stage. In addition, since it is possible to wash with an appropriate amount of water, it is possible to prevent wasteful use of water, and it is possible to prevent a decrease in dirt of laundry due to a shortage of water.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction contents]

In step S4, the user sets a washing course. This setting is switched washing course is performed by pressing a course button in washing濯condition setting button 27b (see FIG. 3), a washing condition display section 28b
Character of each wash course (see FIG. 3) in the one of the courses that have been selected are now displayed lighted.
Then, the lit-up character is set as the washing course. In the present embodiment, a standard course is set (lit and displayed) as shown in FIG. Then, control goes to a step S5.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0048

[Correction method] Change

[Correction contents]

Further, since the amount of detergent used and the amount of water used during the washing process are displayed on the display unit 28 in accordance with the detected laundry capacity, the use of the laundry is started after the detection of the laundry capacity is started.
Shorten the time until the amount of detergent and water used is displayed.
Bets can be, the user can know the proper use amount of detergent and water consumption according to the laundry capacity early. In addition, since the laundry can be washed with the proper amount of detergent and water, it is possible to prevent the detergent and water from being wastefully used, and to prevent the laundry from being soiled due to the shortage of the amount of detergent and water. Further, by detecting whether or not the user has put the detergent into the detergent charging case 23 by detecting the open / close state of the detergent charging case 23, the washing is performed with the detergent charging case 23 opened. Can be prevented.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0057

[Correction method] Change

[Correction contents]

As described above, in the second embodiment, the coil 74 is mounted on the cylinder 72, which is a stationary part, and the magnetic body 75 is mounted on the shaft 73 which is displaced together with the water tank 7, so that the drum type washing machine is used. When manufacturing the drum-type washing machine 70, it is not necessary to separately mount the coil 74 and the shaft 73, and the manufacturing process of the drum-type washing machine 70 can be simplified. Further, in the control circuit 19, the used detergent amount is displayed on the display unit in accordance with the set detergent type and the detected laundry volume, so that the user can take an appropriate amount in accordance with the type of detergent to be used. The amount of detergent used can be known at an early stage. As a result, the laundry can be washed with a less wasteful detergent amount.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0070

[Correction method] Change

[Correction contents]

The present invention is not limited to the embodiment described above and shown in the drawings.
Extension is possible. In the embodiment of the present invention, the used detergent amount and the used water amount are displayed in the first embodiment, and the used detergent amount corresponding to the detergent type is displayed in the second embodiment.
The amount of detergent used, the allowable amount and the surplus amount are displayed in the embodiment of
And then start to detect the laundry capacity and display the above amounts
And configured to shorten the up time to, but these the
The display functions of the respective amounts may be provided in any combination as needed.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0073

[Correction method] Change

[Correction contents]

[0073]

As is apparent from the above description, in the drum type washing machine of the present invention, the displacement of the water tub with respect to the outer box according to the capacity of the laundry put into the rotating tub is determined by the positional relationship between the coil and the magnetic material. The displacement of the water tank with respect to the outer box is instantaneously determined as the change in the oscillation frequency because the capacity of the laundry in the rotating tub is detected by converting the oscillation frequency according to the inductance component of the coil. , And the laundry capacity can be detected in a short time . Moreover, by setting the region where the rate of change in the oscillation frequency is large as the detection range, the accuracy of detecting the displacement of the water tank with respect to the outer box can be improved, and the accuracy of detecting the capacity of the laundry can be improved . The laundry capacity can be detected in a short time and with high accuracy. Also, the detected washing
Indicate the amount of detergent used and the amount of water used, etc. according to the rinse volume
After starting the detection of the laundry capacity,
The time until each amount is displayed can be shortened,
Can be notified at an early stage.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Kiyoe Ochiai 991 Anada-cho, Seto-shi, Aichi F-term in Toshiba Aichi Factory (reference) 3B155 AA21 BA12 BA23 BB02 BB05 BB08 BB14 CB32 JB05 JB06 JB13 JB24 JB26 KA02 KA31 KA36 KB11 KB27 LB05 LB22 LB31 LB34 LC33 MA01 MA02 MA05 MA06 MA09 MA10

Claims (9)

[Claims] 1. A drum type washing machine comprising: a water tank elastically supported inside an outer box; a drum installed inside the water tank, the rotation of which is controlled by a drive motor; and control means for controlling the rotation of the drive motor. A displacement amount detecting means for detecting a displacement amount of the water tub with respect to the outer box in response to the loading of the laundry into the drum; and And a laundry capacity detecting means for detecting the capacity of the laundry. 2. A displacement amount detecting means comprising: a coil mounted on an outer box or another stationary portion; a magnetic body mounted on a water tank or a portion displaced therewith; and an oscillation frequency according to an inductance component of the coil. The laundry capacity detecting means is configured to detect the laundry capacity in the drum based on the oscillation frequency of the oscillator, and to detect an area where the rate of change of the oscillation frequency is large. 2. The drum type washing machine according to claim 1, wherein the range is set within a range. 3. The drum type washing machine according to claim 1, wherein the control means displays the amount of detergent used in accordance with the laundry capacity detected by the laundry capacity detecting means. 4. The drum type washing machine according to claim 1, wherein the control means displays the amount of water used in accordance with the laundry capacity detected by the laundry capacity detection means. 5. A detergent charging case for charging a detergent into a water tank, and an opening / closing state detecting means for detecting an opening / closing state of the detergent charging case and outputting an opening / closing signal, wherein the control means detects the opening / closing signal based on the opening / closing signal. 4. The drum type washing machine according to claim 3, wherein it is determined whether or not a shift to the next step is possible. 6. Detergent type setting means for setting the type of detergent to be used, wherein the control means controls the laundry capacity detected by the laundry capacity detecting means with respect to the detergent set by the detergent type setting means. 4. The drum-type washing machine according to claim 3, wherein the amount of detergent used is displayed in accordance with the condition. 7. The drum type washing machine according to claim 1, wherein the control means performs a specific display when the laundry capacity detected by the laundry capacity detecting means exceeds an allowable amount. . 8. The drum type washing machine according to claim 1, wherein the control means displays a margin to a permissible amount with respect to the laundry capacity detected by the laundry capacity detection means. . 9. The coil and the magnetic body are mounted on one vertical line so that the magnetic body is stationary at the center axis of the coil when the outer box is installed horizontally, and are configured to be visible. The drum type washing machine according to claim 2, characterized in that: